Oops, it doesn't look like 'dyke day' is a national day..

Other days

frozen yogurt

Frozen Yogurt Day
kiss a ginger

Kiss A Ginger Day
mean girls

Mean Girls Day
boy friend

Boy Friend Day
brow

Brow Day
coffee

Coffee Day
bow tie

Bow Tie Day
kiss a brunette

Kiss A Brunette Day
comfy

Comfy Day
promposal

Promposal Day